3,3,6,6,9,9-Hexamethyl-2,3,4,5,6,7,8,9-octahydro-1H-xanthene-1,8-dione
نویسندگان
چکیده
منابع مشابه
3,3,6,6,9,9-Hexamethyl-2,3,4,5,6,7,8,9-octahydro-1H-xanthene-1,8-dione
The title compound, C(19)H(26)O(3), was synthesized directly from the condensation of 5,5-dimethyl-cyclo-hexane-1,3-dione with malononitrile catalysed by palladium chloride: there are two molecules in the asymmetric unit.
متن کامل9-(4-Hydroxy-3,5-dimethoxyphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione
In the title compound, C(25)H(30)O(6), the two fused cyclo-hexa-none rings have envelope conformations, whereas the central pyran ring is roughly planar [mximum deviation = 0.045 (2) Å]. The pyran and benzene rings are almost perpendicular to each other, making a dihedral angle of 86.32 (2)°. In the crystal, molecules are linked via pairs of O-H⋯O hydrogen bonds, forming inversion dimers.
متن کامل9-(2,4-Dinitrophenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione
In the title compound, C(23)H(24)N(2)O(7), the central 4H-pyran ring adopts a flattened boat conformation, whereas both cyclo-hexenone rings adopt envelope conformations, the C atom bearing the dimethyl substituent being the flap atom in each case. The mean and maximum deviation of the pyran ring are 0.0379 (4) and 0.0605 (3) Å. The mean plane of the pyran ring and the dinitro-benzene ring make...
متن کامل(E)-3,3,6,6-Tetramethyl-9-(2-nitrostyryl)-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione
In the title compound, C(25)H(27)NO(5), each of the cyclo-hexenone rings adopts a half-chair conformation, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms. In the crystal, weak C-H⋯O hydrogen bonds link mol-ecules into chains parallel to the c axis.
متن کامل10a-Hydroxy-9-(4-methoxyphenyl)-3,4,5,6,7,8a,9,10a-octahydro-1H-xanthene-1,8(2H)-dione
In the title compound, C(20)H(22)O(5), the tetra-hydro-pyran, cyclo-hexene and cyclo-hexane rings of the xanthene ring system adopt half-chair, half-boat and chair conformations, respectively. The mean plane of the four roughly planar atoms of the tetra-hydro-pyran ring (r.m.s. deviation = 0.111 Å) forms a dihedral angle of 82.91 (4)° with the meth-oxy-benzene group. In the crystal, mol-ecules ...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online
سال: 2009
ISSN: 1600-5368
DOI: 10.1107/s1600536808042189